Lathe-knife-grinding machine



April 2s, 1925. 1,535,813

W. H. COLLIER LATI-IE KNIFE GRINDING MACHINE Filed May 29, 1922 '7 Sheets-Sheet .1

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w. H. coLLlER mju KNIFE Gnnmme momma Filed May. 29'. 1922v '7 Sheets-.Sheeaizv 2 pril Z8, 1925.

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LATHE KNIFE GRINDING MACHINE Filed May 29. 1922 '7 Sheets-Sheet 3 --mmlazzzer April 28, 1925.

1,535,813 W. H. COLLIER LATHE KNIFE GRINDING MACHINE Filed May 29, 1922 '7 Sheets-Sheet 4 H mw April 2s', 1925.

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w. H. coLLl'ER Filed May 29, 1922 Patented Apr. 28j, 1925.

UNITEDSTATES,

PaTENTv oFHCE;

WILLIAM HL COLLIER, OLE PAINFSVILLE, OHIO.

IiATHE-KNIFE-GRINDING IMIACI'IUI'E.`

` e Application siedi/ray 29, 1922. semik no. 564,452.

\ lToaZZ whom t may concern.'

Be it `known that I, WILLIAM H.. COLLIER,

. a citizen of the: United States, residing at Painesville, in the county oit Lake and 4State ot Ohio, have invented certain new and useful, Improvements in Lathe-KnifeeGrrindino' rapidly rotating, novel mechanism being em-` Cil ployed for traversing the grinding wheel and reversing its movement at each end of the stroke; `the invention valso having the further objects of feeding the grinding wheel by improved means toward the knife by a step by step movement ofn-ovel character, and ofy providing `a constant iiow of water` to the grinding Wheel during the grinding operation.

In the 'drawings .j

F'gure 1, is anelevation of one end of' the machine. j i Figure 2, is a` plan view of the machine with certain parts broken out in order that the details may be shown on a proper scale. j .Figure 3, is an enlarged detail view, partly section and showing the carriage of the machine in side elevation.

`Figure 4, is a front elevation of the carriage certain other parts being shown associated therewith.

`Figure 5, is a plan view of a portion of said carriage, y Figure 6, 1s a plan view of the carriage i the upper part being removed to show the gearing for reversingthemovement` of the carriage. Figure Figure `5..

Figure 8, is aperspective View of a cer-y tain feed lever and pawl used herewith.

`liigure 9, is a detail view of a portion of the clutch shifting mechanism, one of the arts` being shown inv one positionin tull .ires and ina second position in dotted lines. l Figure 10, is a section on the line 10-10 of Figure 2,

,. is a section on the line 7-7 of Fguif'e ,11, is a section on the line 11711 ofFigure 10.

Figure 12, is a section on the line 12.-12 of Figure 10. i j

Figure 13,; is a diagrammatic plan view spewing the general arrangementof thema.- c une.` Y

In the embodiment oi themachinehere shown there is provided a base or bed` 10 having transversely extending ways, `1,1 whereon is slidably mounted a, carriage*121.v

Journalledfin bearings 13. Qn the bed iS2 a main drive shaftV Mprovided with the pul-` ley 15. Secured beneath `the carriage y12 and 'forming part thereof'is a gearcase or housf ing through which passes the shaft 14;, Splined `on the shaft 14 and supported in bearings 17 on the gear Caseisa sleeve 18. On this sleeveare `mounted the bevelled gears 19 and` 20,these gears being oppostely arranged and having their hubs extendingr toward each other and provided onftheir ends with clutch teeth 2 1 Splined on` lthe sleeve 18 between `the gears`19 and 20 is a clutch member 22` provided on its endswith clutch teeth 23 engageable with the teeth 21 ot the gears 19- and 20 in accordance with the position of the clutch 122 These gears 19 and 2O mesh with a gear 24 which is, fixed upon a4 shaft 25 which extends at right angles to the drive shaft 14.` On the end of ther shaft 25 is a pinion 26which1neshes with a rack 27 supported beneath the rear way 11.` The clutch 22 is provided witlia groove 28 to receive the shipper fork 29. This shipper forkliscarried by a` shipper Vrod 30 projecting laterally from the gear case 16 and provided on its projecting end with a head 31.,` Extending lfrom side to side of the machine is a rod 321whereon are slidably mounted the reversingv collars 33 co f which are held in adjusted position on the rodby tlieset screws 34.. "Extending lat,- erally from the gear case l16 is ay lug 35 on which ispivotally mounted a lever 36,' the lever being pivoted intermediate itsends to said lug. Thelowery endjofthis lever is bifurcated and straddles therod 32, thus being adapted-to be brought "intoengagementwith the collars r38 by the movement of the carriage across the machine and the upper end of thislever is provided with an arcuate slot 37 whichreceives a pin 38 pro jecting from the head 31. The upper faceof i the lever 36 is formed to provide angularly disposed surfaces 39. In `the carriagey 16 is formed a vertical opening or bore L10 lll) wherein slides a plunger 4,1 carrying on its .l bein the positions shown in Fig. 4 and the carriage wlll be moving to the right of that ligure. When the lever 36 engages the collar 33 this lever will be turned upon its pivot until the left hand end of the slot 37 engages the pin 38. During this movement of the lever the plunger 41 will be raised against the action of the spring 44 and the roller will pass over the angle between the two surfaces 39. Continued movement of the carriage to the right will then start the shipper rod moving to the right with respect to the carirage and, because of the roller pressing on the left hand angular surface this movement of the shipper rod will be quick and vigorous so that the shipper fork and clutch will be quickly moved to the right and the clutch will thus disengage from the gear 19 and engage with the gear 20 thus changing the direction of movement of the wheel 24 and consequently reversing the movement of the carriage. In order to prevent accidental movement of the head 31 a keeper spring 45 is secured to the gear case 16 and engages the pin 38 as shown. There will naturally be times when it -is desirable to stop the carriage and to this end the head 31 is provided with a bevelled notch or groove 46. On the gear case 16v is a stub shaft 47 whereon is pivoted a H stop lever 48 provided with a wedge shaped and arcuate end 49. The extent of movement of the head 31 and the proportions of the notch 46 and end 49 are such that, with the head Yat, either extremity of its movement the lever 48 may be rotated to force the wedge end 49 into the notch 46 and thuscause the head 31 to move in one direction or the other to disengage the clutch from the gear with which it is engaged at the time. It is obvious that upon freeing the end 49 from the notch 46 the plunger will act to cause engagement of the clutch with one of its gears.

.Mounted on the sleeve 18 is a .gear 50 which is keyed to said sleeve to revolve therewith. This gear 50 meshes with a gear 51 formed on a vertical shaft 52 which is journalled in a vertical sleeve 53 mounted in the carriage 12. On the upper end of the shaft 52 is fixed a bevel gear 54 which meshes -rwith a vbevel gear 55 on the inner member 56 of a telescopic arbor, this memberbeing in the form of a sleeve journalled in the upper part of the carriage 12. The outer arbor member 57k has its inner end slidably mounted in the inner member 56, being keyed thereto to rotate therewith. This outer member is journalled in a head 58 which is slidable on the carriage. This outer member 57 has an inner collar 59 and an outer collar '60 between which the head 58 is engaged so that movement of the head accomplishes movement of the outer member of the arbor. The extremity of the outer member 57 is provided with threads to receive a wheel clamping nut 61 by means of which a grinding wheel 62 may be clamped on the arbor to revolve therewith. The usual guard hood 63 is provided on the carriage to protect the operator in case of breakage of the wheel 62. By means of the gearing just described the rotation of the shaft 14 causes rotation of the wheel 62 and movement of the outer arbor member telescopically may be made without affecting the rotation of said wheel. y

The feeding of the grinding wheel intermittently towards the knife is accomplished as follows. A main feed shaft 64 is journalled in the carriage above and parallel to the shaft 14. This shaft projects outwardly of the carriage through a boss 65 and on its outer end is provided with a ratchet wheel 66 which is keyed securely to the shaft. On

the boss 65 is pivoted a ratchet lever having.

one arm 67 carrying a gravity operated pawl 68. The other arm 69 of this lever is provided with a sleeve end 70 wherethrough passes the shank of an adjusting screw 71 which is screwed into the carriage and is provided with a collar 72 on which the sleeve end 70 rests. Between the knurled head of the screw 71 and the sleeve end'70 is a coil compression spring 73 which serves to hold the sleeve end down on the collar while permitting it to be forcibly raised. In the wall of the bore 40 is formed a vertical slot 74 wherethrough projects a pini 75 which is carried by the plunger 41. This pin projects beneath the arm 69 so that each time the plunger is raised the pin 75y lifts the arm 69 and this, by the action of the pawl 68 rotates the wheel 66 through a certain arc. The length'of this arc is determined by the adjustment of the screw 71 since the higher the collar 72 is located the more the pin 75 can rise before engaging the arm 69 and, since the vertical movement of the pin is always the same, the less will it move said arm 69. On the inner end of the shaft 64 is a bevel gear 76 which meshes with a bevel gear 77 carried on the sleeve 53. This gear 77 meshes in turn with a bevel gear 78 fixed on one end of a shaft 79 which is journalled in a boss 8O in the carriage a collar 81 preventing longitudin-almcvement of said shaft. This shaft 79 has a threaded end which extends through a grinding wheel at one extremity of its longitudinal movement. A

-5. In a grinder for veneer knives having a bed and a carriage traversing said bed, traversing means for the carriage, including a sha-ft extending across thebedvand through said carriage, a pair of confronting bevel gears slidably and revolubly mounted on the shaft within the carriage to Inlove therewith, a clutch member splined on the shaft between the said gears and movable to engage the gears selectively, clutch moving means carried by the carriage and including a rod projecting laterally from the carriage and a lever pivoted intermediate itsends and having its upper end connected to `said rod, `spaced trip collars supported from the bed and engageable by the lower end of the lever to initiate movement of said leverand thereby start shiftingof the clutch, means to eifect complete movement of said clutch, and feed'means actuated by the movement of said lever. i

6. In a grinder for veneer kn-iveshaving a bed and a carriage traversing said bed, traversing means for the carriage including a shaft extending across the bed and through said carriage, a pair of 4confronting bevel gears slidably and yrevolubly mountedion the shaft Within the carriage to move therewith, a clutch member splined on-the shaft between thesaid gears and movable to engage the gears selectively, -a clutch moving rod projecting from said carriage, a pin projecting laterally from the projecting end of said rod, a lever pivoted to said, carriage and having a slot receiving said pin, spaced stops supported from the bedA and engageable bysaid lever to move the latter, said lever having anticlinal cam surfaces, a spring pressed plunger bearing on respective cam surfaces in respective positions of v the lever to force said lever to its extreme positions'means for feedingthe grinding wheel towards theA work, and actuating means therefor mounted on the carriage and thrown into operative position by the movement of the' plunger. A v

7. Ina grinder for veneer knives having a bed and a carriage traversing said bed, traversing means for the carriage including a shaft extending acrossthe bed and riage a pin projecting laterally from the projecting end of said rod, a lever pivoted to said carriage and having a` slot receiving ,said pin, spaced stops supported from the bed yand engageable bynsaid lever to move the latter, said lever having anticlinal cam surfaces, a spring pressed vplunger bearing on respective cam surfaces in respective po- L sitions of the lever,vthev movementof said lever effecting lifting of saidplunger, a telescopic grinding wheel arbor on said earriage, afeed screw connected to one section of the arbor to protrude and retract the same .and including a ratchet wheel a pawl engagingthe ratchet wheel; aflever carrying said-pawl, a pin projecting from the plunger for lifting-the last mentioned lever,

vand meansl for `holding the lastz mentioned lever. la,.selected distance above the lowermost position of the pin whereby to-regulate the extentA of movement of the lever.

In testimony whereof I aiiX my signature.

, .WILLIAM COLLIER. 

